SimCity 4 crashes on start - MacOSX/Steam

[baitric]

When I start the game (MacOS 10.12.5 = Sierra) the game crashes instantly. Checked (via Steam) download file integrity etc., no joy. Steam does not give support, i. e. sent me here. Any ideas what could be wrong or what else to check?

Error messages in crash reporter:

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY
Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [0]